Hi,
It is almost impossible to fix correlation issues in Siebel-Web without complete script data (record and replay snapshots and extended replay log).
The mentioned correlation step is created by simple correlation rule (it is not "array based" correlation that requires to use Siebel Correlation library).
The actual issue may happen also few steps before the point where this error occurred, so you need just to go through replay snapshots from the beginning of the script to the failed step and compare them to the recording snapshots.
Best regards,
Leonid.